4 files changed, 6 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_dump.c b/src/gallium/auxiliary/tgsi/tgsi_dump.c
index 64927ed6e02..91bc1245223 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_dump.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_dump.c
@@ -128,6 +128,7 @@ static const char *semantic_names[] =
    "EDGEFLAG",
    "PRIM_ID",
    "INSTANCEID",
+   "VERTEXID",
    "STENCIL"
 };
 
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index 60de80d0918..97d74e4a9f9 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -182,6 +182,9 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
                   if (fulldecl->Semantic.Name == TGSI_SEMANTIC_INSTANCEID) {
                      info->uses_instanceid = TRUE;
                   }
+                  else if (fulldecl->Semantic.Name == TGSI_SEMANTIC_VERTEXID) {
+                     info->uses_vertexid = TRUE;
+                  }
                }
                else if (file == TGSI_FILE_OUTPUT) {
                   info->output_semantic_name[reg] = (ubyte)fulldecl->Semantic.Name;
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index 30834b4d000..482c106ae79 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -70,6 +70,7 @@ struct tgsi_shader_info
    boolean writes_edgeflag; /**< vertex shader outputs edgeflag */
    boolean uses_kill;  /**< KIL or KILP instruction used? */
    boolean uses_instanceid;
+   boolean uses_vertexid;
    boolean origin_lower_left;
    boolean pixel_center_integer;
    boolean color0_writes_all_cbufs;
diff --git a/src/gallium/auxiliary/tgsi/tgsi_text.c b/src/gallium/auxiliary/tgsi/tgsi_text.c
index 6b97803711f..eb9190ccb57 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_text.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_text.c
@@ -1023,6 +1023,7 @@ static const char *semantic_names[TGSI_SEMANTIC_COUNT] =
    "EDGEFLAG",
    "PRIM_ID",
    "INSTANCEID",
+   "VERTEXID",
    "STENCIL"
 };